Anne and Nancy Use a Metal Alloy That Is $17.4 \%$

Multiple Choice

Anne and Nancy use a metal alloy that is $17.4 \%$ copper to make jewelry. How many ounces of an alloy that is $13 \%$ copper must be mixed with an alloy that is $24 \%$ copper to form 85 ounces of the desired alloy?

A) $39 \mathrm{oz}$
B) $51 \mathrm{oz}$
C) $53 \mathrm{oz}$
D) $34 \mathrm{oz}$